TLO 2 Chart Of The Nuclides

Question 1

ELO 1.2 Describe how stable and radioactive isotopes are identified on the Chart of the Nuclides.

Answer 1

Gray colored boxes denote stable nuclides.

White or color boxes denote unstable nuclides.

Question 2

ELO 2 Neutron/Proton Ratio

Answer 2

The ratio of neutrons to protons in the nucleus becomes larger as the mass numbers become higher.

Ratio = N/Z

Question 3

ELO 3.2 Describe Atom Percent

Answer 3

The percentage of atoms of an element that are of a particular isotope.

Question 4

ELO 3.2 Describe Atomic Weight

Answer 4

The average atomic weight of all isotopes of the element. Calculated by multiplying the isotopic abundance by the isotopic mass and then adding the products for each isotope together.

Question 5

ELO 3.1 Describe Weight Percent

Answer 5

The percentage of weight of a particular isotope of an element.

w/o = (% as decimal) × weight or mass

Question 6

ELO 4 Describe enriched uranium

Answer 6

Enriched uranium is uranium that has a higher concentration of uranium-235 then found a natural uranium.

Question 7

ELO 4 Describe depleted uranium

Answer 7

Depleted uranium is a byproduct of the enrichment process. It is uranium where the isotope uranium-235 has a lower concentration than its natural value of 0.7204%